August 1958
From The Space Library
In 3-week period, 19 five-stage Argo E5 sounding rockets were launched in USAF-NACA program to measure radiation caused by Project Argus, rockets reaching 500-mile altitude and were launched from Wallops Island, AMR, and Ramey AFB, Puerto Rico.
Experimental "weightlessness" flights in C-131B aircraft begun at Wright Air Development Center.